Hi Ramana, On 16 December 2010 20:11, Ramana Radhakrishnan <ramana.radhakrish...@arm.com> wrote: > Hi Ira, > > On Thu, 2010-12-16 at 15:29 +0200, Ira Rosen wrote: >> - telecom viterbi (vectorization potential gain is 4x) requires >> conditional store sinking and load hoisting to enable if-conversion. I >> worked on implementation of store sinking this week. > > Is this the only feature that viterbi needs for vectorization ? > > >From some research that Tejas did earlier this year, I thought that > viterbi was among the hardest to vectorize because in addition to what > you mention we need to support vld/st2 or (ofcourse vzip and vld1 if we > don't support vld2) instructions and the other vbif / vbsl instructions > to support vectorization for viterbi.
Right, we need vld2 and vst2 for Viterbi, and we are working on their implementation (see this thread for the latest discussion http://lists.linaro.org/pipermail/linaro-toolchain/2010-December/000540.html). > > I see that we support v<cond> in the backend now but we don't support > the vector bitfield instructions like vbit / vbif and vbsl which can be > used for vector select other than through intrinsics. I haven't checked this. But in any case vector select is very important and it's a good idea to support it anyway. Ira > > I could be of-course missing something here .... > > cheers > Ramana > > > >> >> Ira >> >> _______________________________________________ >> linaro-toolchain mailing list >> linaro-toolchain@lists.linaro.org >> http://lists.linaro.org/mailman/listinfo/linaro-toolchain > > > _______________________________________________ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-toolchain
